Improvement in ivlachines for sawing spokes



J. L. THRALLS.

Machines for Sawing Spokes. No. 142,749, v PatentedSeptember9,873.

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ilimww Wwf z WM5@ y@ UNITED STATES PATENT @Ferca JosnPH L. THn'ALLs, onwAnsAw, INDIANA.

IMPROVEMENT IN MACHiNES FQR SAWING SPOKES.

Specitication forming part of Letters Patent No. 142,749, datedSfptembtr 9, 1873; application led January 4, 1873. v

To all whom it may concern:

Be it known that I, JOSEPH L. THRALLs, of Warsaw, in the county ot'Kosciusko and State of Indiana, have invented certain Improvements inMachines for Sawing Spokes, ot' which the following is a specification:

Figure l is a perspective view of my improved machine, showing thedriving mechanism, theposition of the saws, the adjustable head-block,the vertical feed-screws, the horizontal feed mechanism, and the dog forholding the boltin position. Fig. 2 is an end view of the machine,showing the driving-belts and the supports for the bolts to be sawed.Fig. 3 is a perspective View of the nuts and their projections forholding` the bolts in position; and Fig. 4 is a sectional elevation ot'the rack and a portion ot' the head or carriage, showing the means forlengthening and shortening the carriage to adapt it to different lengthsof spokes.

Thisinvention relates that class of machines for manufacturing blankspokes, which consist in the main of two circular saws, cutting at rightangles to each other on the sameline, and a carriage, which supports thebolt on its temporary journals in adjustable boxes arranged aboutvertical above the line of cut, the bolt being gradually sawed up intoblank spokes by successively turning it and lowerin g its supportingjournal-boxes. My improvement consists in adding to the ordinaryvertical adjustment of the journal-boxes means for also adjusting themhorizontally to and from each other to adapt the machine for sawingblank-spokes of varying lengths.

In constructing machines of this character I use a frame,fA, of anysuitable material, and of such form and dimensions as will adapt it toreceive and support, in their proper position, the other parts of themachine. Upon the upper surface of two of the longitudinal beams ot' theframe A there are placed ways B B', the one marked B being the farthestremoved from the saws, it consisting of a bar of metal, which is securedto the frame A, and has a flan ge projecting inwardly for the purpose ofallowing the foot of the adjustable head to embrace it, and thus preventsaid head from being moved.

The other way, which is designated by the letter B', consists of a barof metal, having an 'upwardly-projecting way upon it, upon and againstwhich the other feet of the head rest. These ways serve as a track uponwhich the head travels, and also as guides for directing the movementsof said head. The adjustable head above alluded to consists of twobrackets or end pieces, G U', adjusting-screws D D, nuts Dl D1, and adog, D2., the brackets being of the form shown or of any other suitableform, their lower ends or feet being fitted to slide upon the ways B B',as clearly shown in Fig. 2 of the drawings. The vertical portion ofthese brackets rises sufficiently high to allow the adjusting-screws D Dto be of suftioient length to enable them to properly adjust anyrequired size of bolt with reference to the saws, they being providedwith projections for such screws to pass through. Upon the screws D Dare placed nuts D1 D1, which have upon them projections which form boxesfor the pins that are inserted into ends of bolts to turn in. The dog D2is pivoted to one of the brackets, as shownin Fig. 1, it being soarranged that when the bolt is in position its hooked end can be driveninto said bolt to prevent it from turning while the saws are acting uponit.

The arrangement of the above-described parts is such that when a bolt ofthe proper length has been placed in the machine, as shown in Fig. l, itmay be moved to and past two saws, E and F, the one lettered E beingplaced upon a vertical shaft, and so arranged that its surface issomewhat above the lower ends of the adjusting-screws D, and so that itsperiphery shall extend inwardly to, or about to, the outer surface ofthe one designated by the letter F, which is placed upon a horizontalshaft; F', having its bearings in the frame A, they being so placed thatthe periphery of the saw shall be about on a line with the upper surfaceof E, so that as the bolt is placed in the position shown in Fig. 2, andis moved past the saws, a portion of said bolt is cut out and allowed todrop to the floor, and so that by detaching'the dog and turning the boltthc proper distance, and then dogging it again, the carriage may bemoved in the opposite direction, and a blank, of the proper form for acarriage-spoke, sawed from the bolt, when,

by again turning` the bolt and reversing the movements of the head orcarriage another blank will be cut; and so the operation can be repeateduntil the bolt has been reduced to such dimensions as will prohibitthecutting of more blanks therefrom.

The saws are driven by belts, which pass over pulleys placed upon ashaft which is located upon the frame A, and the head, which serves as acarriage for the bolt is moved forward and backward by means of a rack,G, which is secured to the under side of the brackets C C', and meshesinto a pinion, G', placed upon a shaft, which extends transverselyacross a portion of the frame A, and is supplied with a cone of pulleysupon its outer end, which may derive their motion from any mechanismwhich can `have its movement re' versed as the movement ot' the head orcarria ge is to be changed. In order that the head or carriage maybeadjusted to the different lengths ot' spokes which are to be cut, rodsG2 C2 are made to pass through the lower portions of the brackets C Cl,which may beheld in position by means of set-screws or in any othersuitable manner, and the rack G is provided with holes, into which thebolts which secures it to the brackets pass, so that when it becomesnecessary to place a longer or shorter bolt in the machine these boltsare removed, and the brackets are placed farther apart, and the boltsreplaced, they passing through other holes in the rack, the rods servingto keep the two brackets parallelwit-h each other when the rack isunbolted.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s

The horizontally-adj ustable brackets G G1 of the carriage, incombination with the screws D D, vertically-adjustable combined nuts andboxes D1 D1, and saws E and F, constituting a mechanism for sawing blankspokes of va.- rious lengths from bolts ot' timber, substantially asspecified.

In testimony whereof I have signed my name to this specification iu thepresence of two subscribing witnesses.

JOSEPH L. THRALLS.

Witnesses:

P. L. RUNYAN, Jr., N. N. BoYDsroN.

